I remember in school, my science teacher saying he personally didn't believe the melting of the icecaps would cause the sea levels to rise all that much.
The example he used was if you have a glass of coke with ice in it and it melts does your glass overflow?
Even if the level of the ice was above the rim of the glass the water displacement and weight of the ice will already be accounted for.
Which seemed pretty reasonable.
But then again if the ice is touching the bottom its weight is being supported by the ice itself and not the water, no? so maybe he didn't think that through, but i'm no Archimedes lol
edit on 25-7-2012 by WhoWhatWhy because: (no reason given)